Chair



FIG. 1 is a front perspective view of a design for a chair according to a first embodiment;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is left side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a top view thereof.

Features shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a chair, as shown. 